Hi,
I have several draw.io diagrams in table in my confluence page, like that:

( sorry for this horrible picture, I had some company informations that I prefered to hide
)
Then , when I export this to PDF, this is what it looks like:

By diagram is huge, and there are like 4 empty pages after, and the text on the right side of my table has disappeared...
=>Actually after a few tries, I have found a workaround, which I throught would be nice to share, since I guess I won't be the only one struggling wit this issue
In my draw.io diagram, I enabled Mathematical Typesetting: 
And my diagram in PDF export look great!!